Amanda Seyfried's high heel slip In Time

Amanda Seyfried collapsed in a heap with Justin Timberlake during a high heel slip on the set of their new film 'In Time'.

The 25-year-old actress was shooting an action scene with the singer-and-actor and as she was running in her stacked shoes she took a tumble which resulted in Justin landing on top of her.

She told Stylist magazine: "On the second day I was running and I didn't have the stunt heels on yet and I fell so bad . luckily I was holding onto Justin's hand so he had to swing me down without hitting my head - really funny but really scary at the same time. I literally flew underneath him, he landed on top of me. It was just because I was running so fast, the fastest I could ever possibly run with heels bigger than these (I have) on - terrifying."

Amanda loved the physical challenges the science-fiction thriller presented her with and although she enjoyed performing her own stunts, she doesn't think she could be a full-time action star.

She added: "I felt like a dude . I loved it. They didn't treat me any different because I was a female . (but) I just don't think I'll ever be like Angelina Jolie in that respect because it's just so full-on, you get really tired really easily."